Ring-gage



A. H. MAYNARD.

RING GAGE.

APPLICATION FILED MAR. 8, 1919.

1,330,330. Patented Feb. 10,1920.

AMOS H. MAYNARD, 0F EAST DURI-IAM, NORTH CAROLINA.

RING-GAGE.

Specification of Letters Patent.

Patenten Feb. 1o, 192e.

Application filed March S, 1919. VSeriaI No. 281,375.

To all whom t may concern.'

Be it known that I, AMos I-I. MAYNARD, a citizen of the United States,residing at East Durham, in the county of Durham and State of NorthCarolina, have invented cer.- tain new and useful Improvements in RingGages, of which the following is a specification.

This invention relates to gages, and more especially to those formeasuring circular sizes by means of a flexible band; and it has as oneof its objects to provide a gage which will be compact and may beadjusted to fit the linger with any desired degree of snugness, andwhich will be accurate in itsdetermination of ring sizes. n

Another object of the invention is to provide ya gage of suchconstruction that it will not be liable to a disarrangement of its partsand in which any adjustment made will be retained until a new adjustmentis effected.

In the accompanying drawings:

Figure 1 is a perspective view of the gage embodying `the presentinvention, certain of the parts being separated so as to betterillustrate the construction;

Fig. 2 is a vertical longitudinal sectional view through the gage;

Fig. 3 is a perspective view of a portion of the gage. Corresponding andlike parts are referred to in the following description and indicated inall the views of the accompanying drawings by the same referencecharacters.

The device embodying the present invention includes a tubular handlewhich is indicated by the numeral 1 and which is interiorly threaded atone end as indicated by the numeral 2 and exteriorly threaded at itsopposite end as indicated by the numeral 3. The numeral 4 indicates ingenerala tubular shank which at one endis provided with a threadedcylindrical portion 5 which is fitted into the end 2 of the handle 1 asclearly shown in Fig. 2 of the drawings. The said shank 4 while oftubular form is fiat and substantially rectangular in cross section sothat the bore thereof, indicated by the numeral 6, is of similar form.

The finger encircling member of the gage is in the nature of a gageband? of resilient metal and this band at one end is welded or otherwisesecured as at 8 to the outer end of the shank 4, this extremity of theband extending slightly beyond the point of attachment to the said endof the shank for a purpose which will presently be made apparent. Theband 7 from its secured end is bowed to substantially7 circular form andinserted slidably through the bore 6 of the shank 4, the bowing of-theband providing a finger loop 9 lying' beyond the outer end of the saidshank. It will now be observed by reference to the drawings that innersurface of the loop 9 describes substantially a true circle and isadapted to accurately fit the finger to be measured, and by sliding theband longitudinally in the shank 4, the loop 9 will be expanded andcontracted. In order thatthis expansion and contraction may bemeasuredso that when the band is fitting a finger the ring size will beindicated to the user of the device, the band is provided upon the upperface of its portion which is slidably fitted within the bore 6 of theshank 4 with a suitable scale indicated by the numeral 10 and this scaleis visible through an opening 1l formed in the upper side of the saidshank 4 and adjacent which opening the shank is provided with anindicatorv point or notch 12 with which the marks of the scale 10 may bebrought into registration.

The numeral 13 indicates a sleeve which is interiorly threaded asindicated by the fork having arms 15 extending beyond one of its ends.The inner end of the band 7 extends into the tubular handle 1v and isconnected as at 16 to the arms 15, the sleeve 13 being located of coursewithin the said handle and being freely movable longitudinally therein.Inorder that this movement may be effected a stem 17 is threaded intothesleeve 14 and this stem is reduced as indicated by the numeral 18 andits reduced end is rotatably fitted through an opening 19 formed in acap 20 threaded onto the end 3 of the handle 1. In reducing the stem ashoulder 21 is formed and this shoulder bears against a washer 22loosely fitted upon the reduced end of the stem and thus the stem isswiveled to the handle where it is confined between the shoulder 21 andthe head of the cap 20. A milled head 23 is secured in any suitablemanner upon the re- 4numeral 14 and which is provided with a duced end18 of the stem 17 beyond the cap i adjust the sleevel, and therefore toexpand and contract the loop 9. In order to inspect, repair or replaceinterior parts, the head 23 is rotated to enlarge the loop, and then thecap 20 is unscrewed from the threaded end 3 of the handle and the handleunscrewed at l 2- from the shank 4. This gives access to the pin orrivet 16 which may now be driven out, and the parts are free forseparation. After cleansing and repairing theyv are restored by reversalof this operation. 1t will be obvious that in order to impart accuracyto the measurement indicated within the side opening` 11, the handle maybe adjusted Where it is screwed onto the shank, or the cap where it isscrewed onto the handle, or both;v and the careful jeweler or other userwill doubtless test the instrument after its parts have been 'separatedand restored, so that subsequent measurements will be accurate.

Having` thus described the invention, what is claimed as new is:

The herein described gage, thesame cornprising` a shank having alongitudinal bore and a sight opening intersecting the same,

a handle screwed onto the inner end of lthe,

lmilled head on the outside of the latter, a

sleeve within the handle threaded at one end on said screw and forked atits other end, and a pin through the fork arms and the other end Of saidband.

In testimony whereof I affix my signature.

AMOS H. MAYNA'RD. [n s]

